# xojs/xo

❤️ JavaScript/TypeScript linter (ESLint wrapper) with great defaults

Repository: https://github.com/xojs/xo
Canonical: https://ross.abutalabs.com/products/xo
Language: TypeScript
License: MIT
License Family: permissive
Topics: eslint, eslint-plugin, eslint-rules, linter, nodejs, shareable-configs, best-practices, unicorns, xo, code-style, style-linter
Last push: 2026-07-29T23:27:31+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 95, release rhythm 92, longevity 100
- inputs: {"age_days": 4050, "days_push": 35, "days_rel": 58, "gap_med": 6.5, "n_releases_24m": 19}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7993, forks 307 (observed 2026-08-28T04:10:11.418804+00:00)

## What it is
XO is an opinionated JavaScript/TypeScript linter that wraps ESLint with sensible, preconfigured defaults and bundled plugins. It works as a zero-config CLI tool while remaining customizable via flat config.

## Use cases
- lint javascript and typescript files without configuring eslint
- enforce consistent code style across a project
- auto-fix lint issues with xo --fix
- add linting to a project quickly with npm init xo
- stop debating code style in pull requests
- lint a project with prettier-compatible style

## When to choose
- you want zero-config linting with opinionated best-practice defaults
- you want TypeScript support out of the box
- you want a single tool bundling useful ESLint plugins like unicorn and import
- your project uses ESM and Node.js

## When to avoid
- you need fully custom ESLint rule configurations
- your project is CommonJS (XO requires ESM)
- you need linting for languages other than JS/TS

## Facets
- artifact type: cli-tool
- maturity: active
- function: linter, formatter, developer-tools, cli
- domain: developer-tools, web-development
- platform: cli, cross-platform
- tags: eslint-wrapper, code-style, typescript, zero-config, opinionated, command-line, javascript, nodejs

## Member repositories
- xojs/xo (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:11.418804+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:32:33.566800+00:00, confidence not recorded.
  - readme: https://github.com/xojs/xo (fetched 2026-08-28T04:10:11.418804+00:00, sha 6d107e572795)
- Data as of 2026-08-30T08:39:29.467469+00:00.